- Cadila Healthcare
- Cadila Pharma
- Calmoseptine
- Camber
- Carels
- Catalent Australia
- Catalent Germany
- Catalent Pharma
- Catalent UK
- Cathay Drug
- Cathay YSS
- Cell Pharm
- Celogen Generics
- Celogen Pharma
- Celon Laboratories
- Celsus
- Center Lab
- Centurion Lab
- Changchun Zhuoyi
- Chiesi Farmaceutici
- Cho-A Pharm
- Chong Kun Dang
- Cilag AG
- Cipla
- Cisen Pharmaceuticals
- Clearvue Pharma
- CM Star
- Compact Pharmaceuticals Corp
- Concept
- Conjug8 Corp
- Cooper Pharma
- Corbridge
- Corona Remedies
- Cosmas
- Cosmax NBT
- Cosmecca Korea
- Cosmoproject
- Crisdy-Na
- Croma Medic
- CSL Behring
- CT Lab Farmaceutico
- CTCBIO
- Cybele
- Cycus Pharma